I am currently designing my new touring frame and would like some suggestions. I'll start with what I have so far.
I am using oversize tubing with a 36mm HT for the surly LHT fork (45mm rake, 376mm axle to crown) I'm planning to use.
Seat Tube: 580mm
Top Tube: 573mm
Seat Tube Angle: 73
Head Tube Angle: 73 - I would go 71-72 if I could find suitable head lugs
Chain Stays: 440mm
So my questions are
1. Bottom Bracket drop/height: I was going to go with a 75mm drop, but I was looking at the LHT and they have such a small drop, only 47mm. Could anyone suggest why the drop is so small? I would think a touring frame would not have to worry about pedal strike.
2. Should I go with oversize tubing? I am a very light (55kg) rider, but will be loading the bike with about 15kg - 20kg at times.
3. Drop Outs: I was contemplating using articulated angle dropouts to make fitting a little easier.
4. How is the bottom braket angels measured. I understand the ST-DT, ST-CS, but the CS-CS angle is confusing me.What does 7degrees actually mean?